I grind for 4 hours location with mage of seasons and not get any card of them, on some sites I see droprate for it is 0.3% but at this moment I have 1200 shards, also ~1/3 of mages was mobs who have x10 droprate, so I think I kill near to 700 mages of season and 300 (yea, I tried kill 100 of them directly, by reenter the room with 2 mages and 2 knights) - x10 rated mages, so you need to kill more than 3700 for card (And I still don't get this card) - it's EXACTLY not 0.3% of droprate, I relauch the game, but this problem is still there (I kill after that near to 300 mages so summary score is near to 3700), I get all other cards pretty fast, but not that one
SO! if we count we will get 1/3700*100%=0.027%
But! If we count in other way, according on site information for 0.3% of droprate then we get that I not get card 11 times, sooo, that can be two ways:
That I'm is pretty lucky! because chance to not get any card for 3700 killed enemies = 0.00015%
OR
That this card is bugged
SO! if we count we will get 1/3700*100%=0.027%
But! If we count in other way, according on site information for 0.3% of droprate then we get that I not get card 11 times, sooo, that can be two ways:
That I'm is pretty lucky! because chance to not get any card for 3700 killed enemies = 0.00015%
OR
That this card is bugged